tiny4412 --uboot移植(2) 点灯

2022-01-25 23:41:21

开发环境：win10 64位 + VMware12 + Ubuntu14.04 32位

工具链：linaro提供的gcc-linaro-6.1.1-2016.08-x86_64_arm-linux-gnueabi

要移植的u-boot版本：u-boot-2016-11

Tiny4412开发板硬件版本为：

底板： Tiny4412SDK 1312B

核心板：Tiny4412 - 1306

在上一节中我们为tiny4412开发板添加相应目录文件，并且可以顺利编译通过生成.bin文件。接下来我们通过点亮tiny4412核心板上的LED灯开始调试u-boot。

4412裸板开发（1点灯）

代码，原理都与裸板相同，就不多做介绍。

1、直接将其添加进 arch/arm/cpu/armv7/start.S

diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S

index 7eee54b..387f2ac 100644

--- a/arch/arm/cpu/armv7/start.S

+++ b/arch/arm/cpu/armv7/start.S

@@ -60,7 +60,7 @@ switch_to_hypervisor_ret:

        orrne   r0, r0, #0x13           @ set SVC mode

        orr     r0, r0, #0xc0           @ disable FIQ and IRQ

        msr     cpsr,r0

 /*

  * Setup vector:

  * (OMAP4 spl TEXT_BASE is not 32 byte aligned.

@@ -84,7 +84,7 @@ switch_to_hypervisor_ret:

        bl      cpu_init_crit

 #endif

 #endif

// bl_main 之前加，在cpu_init 之后

+    bl light_led

        bl      _main

 /*-----------------------------------------------------------------------------

@@ -293,3 +293,13 @@ ENTRY(cpu_init_crit)

        b       lowlevel_init           @ go setup pll,mux,memory

 ENDPROC(cpu_init_crit)

 #endif

//最后面加

+    .globl light_led

+light_led:

+    ldr r0,=0x110002E0

+    ldr r1,=0x00001111

+    str r1,[r0]

+

+    ldr r0,=0x110002E4

+    mov r1,#0xF0

+    str r1,[r0]

+    mov pc,lr

2、将sd_fuse 文件夹复制到根目录下，其中包括exynos4412启动所需的二进制固件：E4412_N.bl1.bin、E4412_tzsw.bin 、sd_fuse.c、fast_fuse.sh、sd_fusing.sh

只需要修改sd_fusing.sh

#

# Copyright (C)  Samsung Electronics Co., Ltd.

#              http://www.samsung.com/

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License version  as

# published by the Free Software Foundation.

#

####################################

if [ -z $ ]

then

    echo "usage: ./sd_fusing.sh <SD Reader's device file>"

    exit

fi

if [ -b $ ]

then

    echo "$1 reader is identified."

else

    echo "$1 is NOT identified."

    exit

fi

####################################

#<verify device>

BDEV_NAME=`basename $`

BDEV_SIZE=`cat /sys/block/${BDEV_NAME}/size` 

if [ ${BDEV_SIZE} -le  ]; then

    echo "Error: NO media found in card reader."

    exit

fi

if [ ${BDEV_SIZE} -gt  ]; then

    echo "Error: Block device size (${BDEV_SIZE}) is too large"

    exit

fi

####################################

# check files

####################################

# fusing images

signed_bl1_position=

bl2_position=

uboot_position=

tzsw_position=

#<BL1 fusing>

echo "---------------------------------------"

echo "BL1 fusing"

dd iflag=dsync oflag=dsync if=./E4412_N.bl1.bin of=$ seek=$signed_bl1_position

#<tiny4412-spl.bin fusing>

echo "---------------------------------------"

echo "tiny4412-spl.bin fusing"

dd iflag=dsync oflag=dsync if=./tiny4412-spl.bin of=$ seek=$bl2_position

#<u-boot fusing>

#echo "---------------------------------------"

#echo "u-boot fusing"

#dd iflag=dsync oflag=dsync if=E4412UBOOTof= seek=$uboot_position

#<TrustZone S/W fusing>

#echo "---------------------------------------"

#echo "TrustZone S/W fusing"

#dd iflag=dsync oflag=dsync if=./E4412_tzsw.bin of=1seek=tzsw_position

#<flush to disk>

sync

####################################

#<Message Display>

echo "---------------------------------------"

echo "U-boot image is fused successfully."

echo "Eject SD card and insert it again."

3、u-boot根目录下添加编译脚本文件build-tiny4412.sh

   echo "****clean****"

   make clean

   echo "----config tiny4412----"

   make ARCH=arm tiny4412_defconfig

   echo "----building----"

   make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-

在完成前两部后，在根目录执行build-tiny4412.sh ，正常会在spl下生成tiny4412-spl.bin。这就是通过board/samsung/tiny4412/tools/mktiny4412spl.h生成的bl2。然后把tiny4412-spl.bin拷入sd_fuse ，用sd_fusing.sh 烧入SD卡即可。

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